// Invalid regex pattern should be handled gracefully
        urlFilter.addInclude(".*[invalid");
        urlFilter.addInclude("https://valid.com/.*");

        // Valid pattern should still work
        assertTrue(urlFilter.match("https://valid.com/page"));
    }

    /**
     * Test adding a single exclude pattern
     */
    public void test_addExclude_singlePattern() {

        // Properties should work without container
        assertEquals("noContainer", ruleWithoutContainer.getRuleId());

        TestResponseProcessor processor = new TestResponseProcessor();
        ruleWithoutContainer.setResponseProcessor(processor);
        assertSame(processor, ruleWithoutContainer.getResponseProcessor());

        // Match should work
        ResponseData responseData = new ResponseData();

    System.out.println("Processed: " + processed + " URLs");
    Thread.sleep(5000);
}
```

## Contributing

We welcome contributions to Fess Crawler! Please follow these guidelines:

1. **Fork** the repository
2. **Create** a feature branch (`git checkout -b feature/amazing-feature`)
3. **Commit** your changes (`git commit -m 'Add amazing feature'`)
4. **Push** to the branch (`git push origin feature/amazing-feature`)